Why Is Jeremiah Called the "Weeping Prophet"?
Why Did God Care Enough about Nineveh to Send Jonah?
What Are We to Make of the Abrupt Finish to the Book of Jonah?
ad'-o (Codex Alexandrinus, Addo; Codex Vaticanus, Eddein) = Iddo (Ezra 5:1; 6:14):
The father (Zechariah 1:1,7 grandfather) of Zechariah the prophet (1 Esdras 6:1).
Orr, James, M.A., D.D. General Editor. "Entry for 'ADDO'". "International Standard Bible Encyclopedia". 1915.